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authorAlexey Brodkin <abrodkin@synopsys.com>2018-06-01 14:34:33 +0300
committerVineet Gupta <vgupta@synopsys.com>2018-06-13 17:46:34 -0700
commit74c11e300c103af47db5b658fdcf28002421e250 (patch)
tree0aaafe27b37fef54e16dd2f3a7a8a95dd50d0eb2 /arch/arc/include
parent29dcea88779c856c7dc92040a0c01233263101d4 (diff)
downloadlinux-74c11e300c103af47db5b658fdcf28002421e250.tar.gz
ARC: Explicitly add -mmedium-calls to CFLAGS
GCC built for arc*-*-linux has "-mmedium-calls" implicitly enabled by default thus we don't see any problems during Linux kernel compilation. ----------------------------->8------------------------ arc-linux-gcc -mcpu=arc700 -Q --help=target | grep calls -mlong-calls [disabled] -mmedium-calls [enabled] ----------------------------->8------------------------ But if we try to use so-called Elf32 toolchain with GCC configured for arc*-*-elf* then we'd see the following failure: ----------------------------->8------------------------ init/do_mounts.o: In function 'init_rootfs': do_mounts.c:(.init.text+0x108): relocation truncated to fit: R_ARC_S21W_PCREL against symbol 'unregister_filesystem' defined in .text section in fs/filesystems.o arc-elf32-ld: final link failed: Symbol needs debug section which does not exist make: *** [vmlinux] Error 1 ----------------------------->8------------------------ That happens because neither "-mmedium-calls" nor "-mlong-calls" are enabled in Elf32 GCC: ----------------------------->8------------------------ arc-elf32-gcc -mcpu=arc700 -Q --help=target | grep calls -mlong-calls [disabled] -mmedium-calls [disabled] ----------------------------->8------------------------ Now to make it possible to use Elf32 toolchain for building Linux kernel we're explicitly add "-mmedium-calls" to CFLAGS. And since we add "-mmedium-calls" to the global CFLAGS there's no point in having per-file copies thus removing them. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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